When the talent disparity between two teams is big, like it is in this game, of course it's an upset.

Broncos over Patriots is not a upset. Patriot's are favored, but only by a little.

Talent disparity is what determines upset? This is news to me. Chargers have been one of the most talented teams in the league for years now, so when the Patriots (Pre Star WRs) beat them, it's an upset? The Patriots were never as "talented" as the Chargers, they didn't have star power, yet were still beating many teams much more talented. Those were upsets?

Talent doesn't say if its an upset or not. It's your record and how good your team actually is. Not how talented it is.